Full Stack Engineer

Senior Software Engineer – Full Stack (React / TypeScript / AWS)

Hybrid- London- 2 days in London (May consider more flexibility on this)

Up to £105k + benefits

SaaS | Clean Energy Tech | High-Growth Start-Up

We’re partnering with an exciting and mission-driven SaaS business operating within the clean energy space, currently looking to hire a Senior Full Stack Software Engineer to join their growing engineering team.

This is an opportunity to work on complex, high-impact software helping organisations make smarter energy investment and infrastructure decisions as part of the global transition towards decarbonisation.

The company is building a highly sophisticated modelling and simulation platform and is looking for engineers who enjoy solving difficult technical challenges while maintaining a strong focus on product, usability, and customer outcomes.

The Opportunity

This is a genuinely product-focused engineering role where you’ll own problems end-to-end — from discovery and solution design through to delivery, iteration, and optimisation.

You’ll work closely with product, design, data, and domain experts, helping shape features around simulation, configuration, analytics, visualisation, and reporting capabilities within a modern cloud-native SaaS environment.

The team values curiosity, autonomy, engineering quality, and collaborative problem-solving.

Tech Stack

• React
• TypeScript
• Node.js
• GraphQL
• AWS (Lambda, ECS, S3, DynamoDB)
• MongoDB
• Python
• Cloudflare

The business is also actively exploring AI and LLM capabilities within both product development and engineering workflows.

What They’re Looking For

• Strong Product Mindset
• Passion for building products with real customer impact
• Ability to think beyond tickets and understand the “why”
• Comfortable collaborating directly with users and stakeholders
• Strong communication and problem-solving skills

Technical Expertise

• Strong commercial experience building modern web applications using React and TypeScript
• Excellent JavaScript/TypeScript fundamentals
• Experience designing scalable systems and APIs
• Strong understanding of software architecture and engineering best practices
• Experience with automated testing and CI/CD pipelines
• Appreciation for clean UX and product quality

Cloud & Platform Experience

• Experience building scalable cloud-native applications in AWS
• Understanding of observability, monitoring, reliability, and security best practices

AI & Modern Engineering Practices

• Comfortable using AI-assisted development tooling
• Interest in how AI/LLMs can improve products and engineering workflows in practical ways

Nice to Have

• Python experience
• Data engineering, analytics, or machine learning exposure
• Experience with visualisation platforms
• Background within SaaS, energy, fintech, scientific computing, or modelling environments
• Start-up or scale-up experience

What’s on Offer

• Competitive salary package up to £105,000 per annum
• Great benefits
• Strong engineering culture with high levels of autonomy
• Opportunity to work on meaningful climate/energy problems
• Professional development budget and learning support
• Choice of equipment and home office allowance
• Access to the latest AI tooling
• International company retreats with global teams

This role has a 3 stage interview process.

If you’re interested in working on genuinely impactful technology within a collaborative and high-performing environment, we’d love to speak with you.